US3905058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Back supports
Assignee: Transamerica Business Credit Corp
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Filing: 1973-08-13
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Granted: 1975-09-16
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Expires: 1993-08-13
Abstract
Abstract Cushion for supporting the lumbar region of the back of a seat occupant comprises a sealed envelope or bladder containing a resilient open celled foam member. A valve assembly, which is heat sealed to a corner portion of the bladder, permits the seat occupant to readily adjust the resilience of the cushion. A mounting strap attaches the cushion to the seat.
Inventors
- 👤 David Horsfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:46
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/42; A47C7/425; A47C27/00; A47C27/08; A47C27/088; A47C27/14; A47C27/18; B; B60; B60N; B60N2/00; B60N2/70; B60N2/7005; B60N2/90; B60N2/914
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A support cushion comprising a bladder, an open-celled resilient filling material within the bladder, a resilient tube communicating with the interior of the bladder and a valve assembly for controlling the air flow through the passage, the valve assembly comprising a clamping device having opposed clamping members on opposite sides of the tube and including a fixed portion sealed to portions of the bladder and a movable portion positioned externally of the bladder and cooperating with the fixed portion to clamp together the walls of the passage whereby to close the resilient tube, said fixed portion comprising a threaded stud rigid with one of the clamping members and extending transversely through the tube, and the movable portion comprises a threaded knob mounted on the stud, the other clamping member being interposed between the knob and the tube.
Claim 2
Dependent Claim
137 words
A support cushion comprising a bladder, an open-celled resilient filling material within the bladder, a resilient tube communicating with the interior of the bladder and a valve assembly for controlling the air flow through the passage, the valve assembly comprising a clamping device having opposed clamping members on opposite sides of the tube and including a fixed portion sealed to portions of the bladder and a movable portion positioned externally of the bladder and cooperating with the fixed portion to clamp together the walls of the passage whereby to close the resilient tube, said fixed portion comprising a threaded stud rigid with one of the clamping members and extending transversely through the tube, and the movable portion comprises a threaded knob mounted on the stud, the other clamping member being interposed between the knob and the tube.
Claim 3
Dependent Claim
17 words
A cushion as claimed in claim 1, wherein the clamping members are located externally of the bladder.
Claim 4
Dependent Claim
19 words
A cushion as claimed in claim 1 and further comprising means for attaching the bladder to a vehicle seat.
Claim 5
Dependent Claim
111 words
A cushion as claimed in claim 3, wherein said bladder and valve assembly are plastic and the said one clamping member comprises a first plate located adjacent one face of the bladder, said threaded stud passing through opposed apertures in the walls of the resilient tube and through an aperture in an opposite face of the bladder, a clearance area existing between the stud and the said apertures, said other clamping member comprising a second plate mounted on the stud externally of the said opposite face of the bladder, said knob being manually rotatable to clamp the tube and the two faces of the bladder between the first and second plates.
Claim 6
Dependent Claim
56 words
A cushion as claimed in claim 4, wherein the second plate includes at least one radially extending slot and said knob includes a recessed groove in its rear surface adapted to Intersect said slot so as to form an air passage from the atmosphere to the clearance area when the knob is rotated in one direction.
Claim 7
Dependent Claim
32 words
A cushion as claimed in claim 5 wherein a retaining member is mounted adjacent one end of said threaded stud to limit the rotational movement of said knob in said one direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |